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Extend medial axis endpoints to fill the entire length. Includes fix for a minor memory leak caused by usage of old signature for Line::point_at()

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This commit is contained in:
Alessandro Ranellucci
2014-03-15 16:53:20 +01:00
parent 52de292a48
commit ed8a2f7330
8 changed files with 54 additions and 10 deletions
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21
xs/src/Polyline.cpp
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@@ -43,7 +43,7 @@ Polyline::clip_end(double distance)
}
Line segment(last_point, *this->last_point());
this->points.push_back(*segment.point_at(distance));
this->points.push_back(segment.point_at(distance));
distance = 0;
}
}
@@ -57,6 +57,23 @@ Polyline::clip_start(double distance)
if (this->points.size() >= 2) this->reverse();
}
void
Polyline::extend_end(double distance)
{
// relocate last point by extending the last segment by the specified length
Line line(this->points[ this->points.size()-2 ], this->points.back());
this->points.pop_back();
this->points.push_back(line.point_at(line.length() + distance));
}
void
Polyline::extend_start(double distance)
{
// relocate first point by extending the first segment by the specified length
Line line(this->points[1], this->points.front());
this->points[0] = line.point_at(line.length() + distance);
}
/* this method returns a collection of points picked on the polygon contour
so that they are evenly spaced according to the input distance */
Points
@@ -79,7 +96,7 @@ Polyline::equally_spaced_points(double distance) const
double take = segment_length - (len - distance); // how much we take of this segment
Line segment(*(it-1), *it);
pts.push_back(*segment.point_at(take));
pts.push_back(segment.point_at(take));
it--;
len = -take;
}